Fastening tool



FIG. 1 is a front perspective view of a fastening tool;

FIG. 2 is a rear perspective view of the fastening tool of FIG. 1;

FIG. 3 is a left side view of the fastening tool of FIG. 1, wherein a right side view is a mirror image thereof;

FIG. 4 is a top view of the fastening tool of FIG. 1;

FIG. 5 is a rear view of the fastening tool of FIG. 1; and,

FIG. 6 is a front view of the fastening tool of FIG. 1. 

CLAIM The ornamental design for a fastening tool, as shown and described. 